Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 153, Issue 2, Pages 166-170Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2009.04.031
Keywords
Structural monitoring; Fibre optic sensors
Funding
- Engineering & Physical Sciences research Council (EPSRC)
- Engineering and Physical Sciences Research Council [EP/F041896/1] Funding Source: researchfish
- EPSRC [EP/F041896/1] Funding Source: UKRI
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In this work, a fibre Bragg grating (FBG)-based moisture sensor has been developed to test the porosity changes in a number of concrete samples when exposed to a series of different freeze/thaw cycles. The concrete samples produced specifically for the work have been analyzed under laboratory conditions using the sensor to monitor the changes in the rate of water ingress into the modified samples. The sensor works by monitoring the arrival of the moisture front at the centre of the cylindrical concrete samples when subjected to a simple water-bath test. The measurements were obtained by using a probe sensitive to the Bragg wavelength shift as a result of volumetric expansion of the moisture-sensitive polymer coated onto the FBG. This work is intended to show the feasibility of the use of the sensor developed to indicate the influence of freeze/thaw damage on the water absorption properties of concrete. (C) 2009 Elsevier B.V. All rights reserved.
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